Award Abstract # 2101800
A Unified Perspective on Singularities in Commutative Algebra and Algebraic Geometry

NSF Org: DMS
Division Of Mathematical Sciences
Recipient: UNIVERSITY OF UTAH
Initial Amendment Date: February 24, 2021
Latest Amendment Date: June 18, 2024
Award Number: 2101800
Award Instrument: Continuing Grant
Program Manager: Andrew Pollington
adpollin@nsf.gov
 (703)292-4878
DMS
 Division Of Mathematical Sciences
MPS
 Directorate for Mathematical and Physical Sciences
Start Date: September 1, 2021
End Date: August 31, 2025 (Estimated)
Total Intended Award Amount: $412,334.00
Total Awarded Amount to Date: $412,334.00
Funds Obligated to Date: FY 2021 = $83,301.00
FY 2022 = $99,165.00

FY 2023 = $114,375.00

FY 2024 = $115,493.00
History of Investigator:
  • Karl Schwede (Principal Investigator)
    schwede@math.utah.edu
Recipient Sponsored Research Office: University of Utah
201 PRESIDENTS CIR
SALT LAKE CITY
UT  US  84112-9049
(801)581-6903
Sponsor Congressional District: 01
Primary Place of Performance: UNIV OF UTAH
155 S 1400 E RM 233
SALT LAKE CITY
UT  US  84112-0090
Primary Place of Performance
Congressional District:
01
Unique Entity Identifier (UEI): LL8GLEVH6MG3
Parent UEI:
NSF Program(s): ALGEBRA,NUMBER THEORY,AND COM
Primary Program Source: 01002122DB NSF RESEARCH & RELATED ACTIVIT
01002223DB NSF RESEARCH & RELATED ACTIVIT

01002324DB NSF RESEARCH & RELATED ACTIVIT

01002425DB NSF RESEARCH & RELATED ACTIVIT
Program Reference Code(s): 9251
Program Element Code(s): 126400
Award Agency Code: 4900
Fund Agency Code: 4900
Assistance Listing Number(s): 47.049

ABSTRACT

This research project brings together different perspectives on singularities in commutative algebra and algebraic geometry. Both algebraic geometry and commutative algebra concern shapes defined by polynomial equations, such as the parabola that is the graph of the equation y = x^2. Not every shape is so smooth; some, such as the graph of the equation y^2 = x^3, have sharp points or other singularities. Study of geometric singularities is important in mathematics and has application to mathematical models for a wide range of important physical, social, and economic systems. Researchers have long known that important types of singularities in classical geometric settings also appear naturally when studying geometric shapes in modular (or clock) arithmetic. In fact, algebraic geometry in the clock arithmetic setting is a key component of modern communications infrastructure. This project aims to develop a theory of singularities in mixed characteristic, a middle ground between the classical and clock arithmetic worlds (that possesses aspects of both). The project also aims to develop geometric applications of this theory and to develop open-source software to study singularities in commutative algebra and algebraic geometry.

Techniques developed in number theory and arithmetic geometry have given rise to numerous recent breakthrough results in mixed characteristic commutative algebra. This project aims to use these methods to develop a singularity theory suitable for studying higher dimensional birational algebraic geometry in mixed characteristic, which would also facilitate translating many of the successes of positive characteristic commutative algebra to this setting. The project additionally aims to develop an analog of F-pure or log canonical singularities (and their centers) in mixed characteristic, to study fundamental groups of singularities, and to study boundary divisors in this setting.

This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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Bhatt, Bhargav and Ma, Linquan and Patakfalvi, Zsolt and Schwede, Karl and Tucker, Kevin and Waldron, Joe and Witaszek, Jakub "Globally $\pmb{+}$-regular varieties and the minimal model program for threefolds in mixed characteristic" Publications mathématiques de l'IHÉS , 2023 https://doi.org/10.1007/s10240-023-00140-8 Citation Details
Bisui, Sankhaneel and Jiang, Zhan and Maitra, Sarasij and Nguyn, Thái Thành and Schwede, Karl "Finding points on varieties with Macaulay2" Journal of Software for Algebra and Geometry , v.13 , 2023 https://doi.org/10.2140/jsag.2023.13.33 Citation Details
Bott, C. J. and Hassanzadeh, Seyed Hamid and Schwede, Karl and Smolkin, Daniel "RationalMaps, a package for Macaulay2" Journal of Software for Algebra and Geometry , v.12 , 2022 https://doi.org/10.2140/jsag.2022.12.17 Citation Details
Ma, Linquan and Schwede, Karl and Tucker, Kevin and Waldron, Joe and Witaszek, Jakub "An analogue of adjoint ideals and PLT singularities in mixed characteristic" Journal of Algebraic Geometry , v.31 , 2022 https://doi.org/10.1090/jag/797 Citation Details
Martinova, Boyana and Robinson, Marcus and Schwede, Karl and Yao, Yuhui "FastMinors package for Macaulay2" Journal of Software for Algebra and Geometry , v.13 , 2023 https://doi.org/10.2140/jsag.2023.13.13 Citation Details
Polstra, Thomas and Schwede, Karl "Compatible ideals in -Gorenstein rings" Proceedings of the American Mathematical Society , v.151 , 2023 https://doi.org/10.1090/proc/16331 Citation Details

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